Since I've made similar experiences, I would guess it's some kind of enterprise software, that is used by other companies internaly? So the amount of users stay

Since I've made similar experiences, I would guess it's some kind of enterprise software, that is used by other companies internaly? So the amount of users stays roughly the same all the time and if it's hosted inside a intranet, you don't have to care about availability too much, since there are bigger problems if the intranet is down. Also it might be easier to make big money with enterprise software since your customers are willing to pay much more money At least in the company I'm currently working in, it's kinda like this (but not as big as you described). Since we are trying to get more into the endusers market, we are now at a point where there needs to be some restructuring and we are transisting to a serviceoriented architecture.